21140432023 has 4 divisors (see below), whose sum is σ = 22253086360. Its totient is φ = 20027777688.

The previous prime is 21140432003. The next prime is 21140432041. The reversal of 21140432023 is 32023404112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21140432023 - 2²⁵ = 21106877591 is a prime.

It is a super-2 number, since 2×21140432023² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21140431985 and 21140432003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140432003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556327140 + ... + 556327177.

It is an arithmetic number, because the mean of its divisors is an integer number (5563271590).

Almost surely, 2^21140432023 is an apocalyptic number.

21140432023 is a deficient number, since it is larger than the sum of its proper divisors (1112654337).

21140432023 is a wasteful number, since it uses less digits than its factorization.

21140432023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112654336.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21140432023 its reverse (32023404112), we get a palindrome (53163836135).

The spelling of 21140432023 in words is "twenty-one billion, one hundred forty million, four hundred thirty-two thousand, twenty-three".